// UnmountPath is a common unmount routine that unmounts the given path and
// deletes the remaining directory if successful.
func UnmountPath(mountPath string, mounter mount.Interface) error {
if pathExists, pathErr := PathExists(mountPath); pathErr != nil {
return fmt.Errorf("Error checking if path exists: %v", pathErr)
} else if !pathExists {
glog.Warningf("Warning: Unmount skipped because path does not exist: %v", mountPath)
return nil
}
notMnt, err := mounter.IsLikelyNotMountPoint(mountPath)
if err != nil {
return err
}
if notMnt {
glog.Warningf("Warning: %q is not a mountpoint, deleting", mountPath)
return os.Remove(mountPath)
}
// Unmount the mount path
if err := mounter.Unmount(mountPath); err != nil {
return err
}
notMnt, mntErr := mounter.IsLikelyNotMountPoint(mountPath)
if mntErr != nil {
return err
}
if notMnt {
glog.V(4).Info("%q is unmounted, deleting the directory", mountPath)
return os.Remove(mountPath)
}
return nil
}
// utility to mount a disk based filesystem
func diskSetUp(manager diskManager, b iscsiDiskBuilder, volPath string, mounter mount.Interface) error {
globalPDPath := manager.MakeGlobalPDName(*b.iscsiDisk)
// TODO: handle failed mounts here.
notMnt, err := mounter.IsLikelyNotMountPoint(volPath)
if err != nil && !os.IsNotExist(err) {
glog.Errorf("cannot validate mountpoint: %s", volPath)
return err
}
if !notMnt {
return nil
}
if err := manager.AttachDisk(b); err != nil {
glog.Errorf("failed to attach disk")
return err
}
if err := os.MkdirAll(volPath, 0750); err != nil {
glog.Errorf("failed to mkdir:%s", volPath)
return err
}
// Perform a bind mount to the full path to allow duplicate mounts of the same disk.
options := []string{"bind"}
if b.readOnly {
options = append(options, "ro")
}
err = mounter.Mount(globalPDPath, volPath, "", options)
if err != nil {
glog.Errorf("failed to bind mount:%s", globalPDPath)
return err
}
return nil
}
func (attacher *gcePersistentDiskAttacher) MountDevice(spec *volume.Spec, devicePath string, deviceMountPath string, mounter mount.Interface) error {
// Only mount the PD globally once.
notMnt, err := mounter.IsLikelyNotMountPoint(deviceMountPath)
if err != nil {
if os.IsNotExist(err) {
if err := os.MkdirAll(deviceMountPath, 0750); err != nil {
return err
}
notMnt = true
} else {
return err
}
}
volumeSource, readOnly := getVolumeSource(spec)
options := []string{}
if readOnly {
options = append(options, "ro")
}
if notMnt {
diskMounter := &mount.SafeFormatAndMount{Interface: mounter, Runner: exec.New()}
err = diskMounter.FormatAndMount(devicePath, deviceMountPath, volumeSource.FSType, options)
if err != nil {
os.Remove(deviceMountPath)
return err
}
}
return nil
}
// utility to tear down a disk based filesystem
func diskTearDown(manager diskManager, c iscsiDiskCleaner, volPath string, mounter mount.Interface) error {
notMnt, err := mounter.IsLikelyNotMountPoint(volPath)
if err != nil {
glog.Errorf("cannot validate mountpoint %s", volPath)
return err
}
if notMnt {
return os.Remove(volPath)
}
refs, err := mount.GetMountRefs(mounter, volPath)
if err != nil {
glog.Errorf("failed to get reference count %s", volPath)
return err
}
if err := mounter.Unmount(volPath); err != nil {
glog.Errorf("failed to unmount %s", volPath)
return err
}
// If len(refs) is 1, then all bind mounts have been removed, and the
// remaining reference is the global mount. It is safe to detach.
if len(refs) == 1 {
mntPath := refs[0]
if err := manager.DetachDisk(c, mntPath); err != nil {
glog.Errorf("failed to detach disk from %s", mntPath)
return err
}
}
notMnt, mntErr := mounter.IsLikelyNotMountPoint(volPath)
if mntErr != nil {
glog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr)
return err
}
if notMnt {
if err := os.Remove(volPath); err != nil {
return err
}
}
return nil
}
